Loki had an office, and it was a very nice office. It was spacious, well decorated, and it carried with it a certain amount of power, being the office of the deputy head. It was power that probably never should have been put into the trickster's hands, but Tintagel and its predeccessor had never been in the habit of vetting its teaching staff for sanity, ability to teach or even the remotest scrap of fondness for children. Honestly, they were lucky he wasn't a complete sociopath like some of the previous faculty.
Still, despite all this, Loki was never the type to sit contentedly by, no matter what he'd been given, which was precisely why he was now sat in, not his office, but Shifu's. He was reclined in the headmaster's chair with his feet up on the desk, flicking through some papers he'd found on the desk to see if there was anything interesting to be found.
Shifu was not an office-hours sort of man; he much preferred to be out in the wilderness breathing clean mountain or ocean air, teaching people practical things. However, someone in a position of leadership had certain responsibilities, and he knew that he owed it to the students and faculty both to occasionally be in the office that had been provided for him so people could actually come and find him if they had need of him.
He was surprised to find that the door to his office was already open, and even more surprised when he realised someone else was seated in his chair, reading through his papers.
Shifu was also not a flying-into-a-rage sort of man, but he did give Loki a somewhat disapproving glance and a lifted eyebrow before he turned to hang his coat on the hook behind the door.
"Might I inquire as to what it is you're searching for in my files?" he asked politely.
Now, that was new. Loki was almost shocked at the calm question - oh sure, there'd been the disapproving look and all, but people were normally a little more put out than that when somebody was rifling through their private things. Especially when it was him - not that he expected the headmaster to actually know who he was.
"Oh, nothing." he said casually, recovering from the surprise as he tossed the papers back on to the desk "Unless there's anything interesting to find there? So far it's all pretty boring."
No mention of the fact that he wasn't supposed to be there, or in fact any indication (apart from his initial surprise) that there was anything amiss with the situation. He didn't even remove his feet from the table.